Fi Series 3 Kit Dog GPS Tracking Collar, Gray, X-Small: 9.5 to 11-in neck, 3/4-in wide

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At a Glance

  • All Lifestages

$189.00 Chewy Price
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About This Item

Details

  • Enjoy 24/7 live GPS tracking with activity and sleep monitoring with this training collar.
  • Create custom virtual fences and escape alerts for added safety.
  • Built for reliability, this collar has up to 3 months of battery life with a wireless charging base.
  • The durable and waterproof design is suitable for all pup sizes and breeds.
  • This purchase includes a 12-month membership for your smart collar.

Instructions

Size

Speaking Dog, So You Don’t Have To

Fi Series 3+ is a smart AI-powered GPS collar, empowering dog parents with the game-changing tech to know where their best friends are, how they’re doing, and what they need to feel their best.

Track Behavior and Habits With AI

Take a proactive approach to your dog’s health with the AI-powered smart collar that detects activity, rest, barking, licking, scratching, eating, and drinking, unleashing a full overview of their well-being.

Advanced GPS and Safety Features

Locate dogs faster than ever with 2x improved GPS tracking, and create custom virtual fences to receive escape alerts when they stray from designated safe zones for total peace of mind. 

Designed With Your Dog in Mind

Tough enough for off-leash hikes, yet comfortable enough for couch naps. The Fi Series 3+ is seriously waterproof, has 500 lbs of tug-resistance, and its light, low-profile design suits dogs of every size. 

About Fi

Since 2019, Fi has been leading the way in GPS collar innovation. With each new generation, they’ve refined their tech to offer sharper tracking, deeper insights, and better support, so you can feel more bonded than ever.

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Questions & Answers

1 Customer Questions

Does the cost include a one year membership

Answer by Chewy • Jun 23, 2025
The Fi Series 3 Collar comes with a Fi Membership, which is required for activation and use of the collar. Your purchase includes: • The Fi Series 3 Collar with charging accessories • The Fi App for 24/7 location tracking and activity insights • Hardware warranty coverage • A 30-day trial for new users The membership gives you access to essential features like GPS tracking, activity monitoring, and Lost Dog Mode.
Reviews
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4.4
Rated 4.4 out of 5 stars
18 Ratings
Terms & Conditions

12 Customer Reviews

Rated 5 out of 5 stars
By Jennifer on Jul 1, 2025

For the escape artist

This comes with a live GPS tracking. We tried the air tag, but that didn't work for the sneaky ninja. I like that you can set a safe zone and how slim it is.

This comes with a live GPS tracking. We tried the air tag, but that didn't work for the sneaky ninja. I like that you can set a safe zone and how slim it is. Now, I tried to get it to go off and much to my disappointment (but my dog's delight) it did not go off when I took him for a joyride. Not only is it smart enough to realize he was in a car, but he was with me. This collar can attach to your phone (and you can invite another owner so the app even tells you who he is with. It tracks naps (boy, my dog is lazy unless trying to figure out how to get out of our 6 ft privacy fence for the next adventure). You can upload vet docs and even pay to monitor barking and such. I know my Boston Terrier ninja talks a lot, so I didn't unlock that. Definitely recommend fot the a ctive people or those with the adventurous escapees.

Rated 4 out of 5 stars
By Beatrice on Aug 11, 2025

Battery isn’t any where near as 3 months. Only last about 8 days.

I enjoy seeing how much activity she gets and where she is. We did go on a 10 day vacation but didn’t take charger and battery was dead after 8 days. I was hoping

I enjoy seeing how much activity she gets and where she is. We did go on a 10 day vacation but didn’t take charger and battery was dead after 8 days. I was hoping she wouldn’t run off. Not happy about battery issues but otherwise it’s good.

Rated 3 out of 5 stars
By andi on Jul 5, 2025

It does track my dog

But to keep up w walks, you have to have your phone w you and remember to hit ‘walk’ then end the walk on your phone when you finish or it’s not logged. I want

But to keep up w walks, you have to have your phone w you and remember to hit ‘walk’ then end the walk on your phone when you finish or it’s not logged. I want to know how much exercise he gets, and that also includes his time running in the back yard but that isn’t tracked at all. So if he gets out, it will help me find him I think, but that’s it.

Rated 5 out of 5 stars
By Sabrina on May 2, 2025

Keeps my golden retriever safe & active

I’ve been using the Fi Series 3 Smart Dog Collar for my 80 lb golden retriever, and it’s truly been a game changer. Not only does it give me peace of mind with its

I’ve been using the Fi Series 3 Smart Dog Collar for my 80 lb golden retriever, and it’s truly been a game changer. Not only does it give me peace of mind with its GPS tracking (especially important in NYC), but it’s also helped me stay accountable with his daily exercise. I can track his steps, activity levels, and make sure he's getting enough movement throughout the day. The battery life is impressive, and the collar is super durable even with all his rolling around in the grass. Highly recommend for any dog owner who wants to stay on top of their dog’s health and safety!

Rated 5 out of 5 stars
By Alicia on May 2, 2025

This smart collar is the smartest purchase we've made.

I don’t know how we ever lived without our Fi Collars. The peace of mind it brings to our family is priceless. One of our favorite features is the customizable

I don’t know how we ever lived without our Fi Collars. The peace of mind it brings to our family is priceless. One of our favorite features is the customizable safe zone around our property. Knowing we’ll get an immediate alert if either dog ever gets out gives us so much peace of mind and an extra layer of security. It’s become such an integral part of our daily routine, and we couldn’t be more satisfied. Not to mention the durability is incredible. Whether we’re at the beach, in the snow, or dealing with mud, the collars hold up through it all. Plus, having both of our dogs on Fi makes things even more fun. We love comparing their daily step counts and it adds a nice layer of competition.

Rated 5 out of 5 stars
By Darrell on May 2, 2025

The best Smart GPS Collar

I've had Fi on my Bernedoodle Teddy for the past two years, and I can confidently say that it's been a fantastic purchase. I bought it for peace of mind in case

I've had Fi on my Bernedoodle Teddy for the past two years, and I can confidently say that it's been a fantastic purchase. I bought it for peace of mind in case he were to get out (his breed has a tendency to run), but I've been surprised by how much I regularly use the other feature, like tracking my walks with Teddy and hitting our step goals. The Fi collar has motivated my wife and I to get out and walk him more, making both us and him healthier. Its also sturdy and fits him great. Since we've had it the team has continued to make improvements to the app, it just keeps getting better. This is a must have if you love your dog!

Rated 5 out of 5 stars
By Melissa on May 5, 2025

A must for all dogs!

The Fi collar has been a total game changer for us. If our dogs ever gets spooked or slips out, especially living in a rural area, it gives me instant peace of mind

The Fi collar has been a total game changer for us. If our dogs ever gets spooked or slips out, especially living in a rural area, it gives me instant peace of mind knowing I can track them in real time. It’s like a safety net I never knew I needed. I also love the step tracking feature. It keeps me motivated to get out with them and makes sure they are staying active and healthy. Honestly, I wouldn’t feel comfortable without it now.

Rated 5 out of 5 stars
By Housewithreallybigdog on May 2, 2025

So excited to see Fi on chewy!

We love our collar for our massive 180lb great dane. Hes an escape artist, sneaking out of the front door whenever its left open by accident, and we love the peace

We love our collar for our massive 180lb great dane. Hes an escape artist, sneaking out of the front door whenever its left open by accident, and we love the peace of mind we get when we have to go recover him in our neighbors yard. We live by a busy road and can never be too careful. Battery life is amazing, and the accuracy of the tracking is perfect. I just wish they made a green color!

Rated 2 out of 5 stars
By Kimberly on May 24, 2025

Cannot really track

If you want to know where your dog is looking at a screen this is fine. But I could not track the dog because it does not show your Latin in comparison to the

If you want to know where your dog is looking at a screen this is fine. But I could not track the dog because it does not show your Latin in comparison to the dog. It would be helpful to know which direction to go to find the dog.

Rated 3 out of 5 stars
By Leslie on Jun 9, 2025

Great when we are far enough away from the house

Doesn’t work as well as I thought when I’m in my home & dog is outside.

Doesn’t work as well as I thought when I’m in my home & dog is outside.